English verb conjugation
COULD SNARL

Regular verb: snarl - snarled - snarled

Affirmation

Simple form	V-ing form
I could snarl you could snarl he could snarl we could snarl you could snarl they could snarl	I could be snarling you could be snarling he could be snarling we could be snarling you could be snarling they could be snarling
Perfect	V-ing perfect
I could have snarled you could have snarled he could have snarled we could have snarled you could have snarled they could have snarled	I could have been snarling you could have been snarling he could have been snarling we could have been snarling you could have been snarling they could have been snarling

Negation

Simple form	V-ing form
I couldn't snarl you couldn't snarl he couldn't snarl we couldn't snarl you couldn't snarl they couldn't snarl	I couldn't be snarling you couldn't be snarling he couldn't be snarling we couldn't be snarling you couldn't be snarling they couldn't be snarling
Perfect	V-ing perfect
I couldn't have snarled you couldn't have snarled he couldn't have snarled we couldn't have snarled you couldn't have snarled they couldn't have snarled	I couldn't have been snarling you couldn't have been snarling he couldn't have been snarling we couldn't have been snarling you couldn't have been snarling they couldn't have been snarling

Interrogative form

Simple form	V-ing form
could I snarl? could you snarl? could he snarl? could we snarl? could you snarl? could they snarl?	could I be snarling? could you be snarling? could he be snarling? could we be snarling? could you be snarling? could they be snarling?
Perfect	V-ing perfect
could I have snarled? could you have snarled? could he have snarled? could we have snarled? could you have snarled? could they have snarled?	could I have been snarling? could you have been snarling? could he have been snarling? could we have been snarling? could you have been snarling? could they have been snarling?

Interro-negative form

Simple form	V-ing form
couldn't I snarl? couldn't you snarl? couldn't he snarl? couldn't we snarl? couldn't you snarl? couldn't they snarl?	couldn't I be snarling? couldn't you be snarling? couldn't he be snarling? couldn't we be snarling? couldn't you be snarling? couldn't they be snarling?
Perfect	V-ing perfect
couldn't I have snarled? couldn't you have snarled? couldn't he have snarled? couldn't we have snarled? couldn't you have snarled? couldn't they have snarled?	couldn't I have been snarling? couldn't you have been snarling? couldn't he have been snarling? couldn't we have been snarling? couldn't you have been snarling? couldn't they have been snarling?